GTM Engineer

About Lifesight Lifesight is the Agentic Unified Marketing Measurement Platform . We unify causal MMM, incrementality testing, and attribution into one system that marketing and finance teams trust — and that AI agents can call. We're bootstrapped-to-scale and profitable. Our products are agentic. Our internal operations should be too. The role You'll be a founding GTM Engineer at Lifesight, building the systems that help our marketing, sales, and customer success teams operate at 10×. You won't replace those teams — you'll give each person on them AI leverage backed by clean data, well-designed tooling, and agentic workflows. GTM Engineer is a fairly new discipline. Hybrid of software engineer, RevOps engineer, and agent builder. You ship production code with Claude Code every week. You work shoulder-to-shoulder with go-to-market teams — you're not a ticket-taker — and your work spans the entire customer lifecycle from first-touch to renewal. What you'll own The GTM data layer — a unified data service that mirrors Salesforce, HubSpot, call-intelligence platforms, analytics, and every ad platform into one queryable layer. Every AI agent and every GTM team reads from it. Pre-MQL systems — signal intelligence (external intent, competitor churn, funding events, job changes, community chatter), approval-gated AI outbound workflows, and owned-channel optimization agents across SEO, CRO, and paid media. Marketing content + campaign pipelines — AI-drafted blog pillars, newsletters, founder LinkedIn posts, ad creative, nurture sequences. Humans edit and approve; agents produce and ship on cadence. Post-MQL systems — integration with GTM OS (our internal revenue-lifecycle platform), call intelligence, deal-risk scoring, mutual action plan generation, renewal and expansion automation. Practical marketing measurement — an attribution layer that closes the loop on what's working, built on our live analytics and CRM stack. Internal tooling — small, sharp tools that replace spreadsheets and manual workflows across the GTM organization. Your first major project will be leading our customer-acquisition and demand-gen transformation — shipping plumbing fixes, standing up the unified data layer, and getting the first production agents into the hands of our marketing and sales teams. A design spec and implementation plan are already written; you'll pick up execution from day one. You are A builder. You write code daily and you ship. You've built internal tools that real teams adopted. A marketer. You know how marketing works and what needs to be done to build revenue pipeline and make profitable spend decisions A systems thinker. You see GTM as a graph of systems, not a funnel diagram. You know where leverage lives. Comfortable with ambiguity. You design your way through under-specified problems and bring clarity back. Opinionated about AI. You know the difference between AI-washed and genuinely agentic. You have a point of view on where LLMs help and where they don't. Collaborative. You sit with a marketer, a salesperson, a CSM — understand their workflow, then automate the parts they shouldn't have to do manually. You've done 5+ years shipping software and working with GTM teams. Title doesn't matter — outcomes do. Built production systems in Python or TypeScript + SQL + REST APIs + webhooks. PostgreSQL experience required. Worked hands-on with Salesforce and HubSpot at admin + API level. Written real integrations, not just used the UI. Integrated at least one analytics or ad-platform API in production (GA4, GSC, Google Ads, LinkedIn Ads, Meta, Bing Ads). Shipped something with the Claude or OpenAI API in production — not a demo, something that runs and produces real value.